Hi there. I was just taxiing from Heathrow Terminal 5 to 27L (directly south of Tower) and fell through the taxiway. Unsure why and how to prevent it from happening again? Received an “aerobatics warning,” despite being on the ground at 12 knots GS but shut down the app and exited the flight as it was clear I wasn’t in flight. Just wondering if this is a known glitch? And if so, how to prevent it from happening again?
Device: iPhone 13
Operating system: IOS 26.5.

